Electric welding and soldering.



F. A. COSTELLO.

ELECTRIC WELDING AND SOLDERING.

APPLICATION HLED DEC. 22. m3. RENEWED OCT. 11. Ian.

1,248,81 3. Patnted Dec. 4, 1917.

WITNESSES: l/VI/E/VTOI? A TTORNE YS UNITED STATES PATENT OFFICE.

FREDERICK A. COSTELLO, OE SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOR, BY' MESNE ASSIGNMENTS, TO HARRISON F. LYMAN, OE BOSTON, MASSACHUSETTS.

ELECTRIC WELDING AND SOLDERING.

Specification of Letters Patent.

Patented Dec. 4,-1917.

Application filed December 22, 1913, Serial No. 808,095. Renewed October 11,1917. Serial No. 196,091.

Figure I represents a diagrammatic viewillustrating one embodiment of my invention.

Fig. II represents a similar view of another embodiment for attaining the same result.

Fig. III diagrammatically illustrates another embodiment thereof.

In the drawings, the numeral 1 designates the line circuit having the primary coil 2' in conjunction with the secondary coil 3 forming the usual transformer, the secondary circuit 4 containing the electrodes 5 and 6 which are adapted to serve as a work holder to retain in position the work 7.

In that form of my invention illustrated in Fig. I, I have shown a second transformer embodying a main shunt 8 having a.

primary coil 9 and the secondary coil 10 connected by the shunt ll' with the main secondary circuit 4, the heating intensity of the circuit 11 being considerably less than the.

circuit 4 for the purpose hereinafter described. In this form of my invention'I em-' ploy the switch 12. controlling the flow through both the primary coils .and then may employ the second switch 13 normally held open as by the spring 14, this second switch controlling the main primary coil 2. To close the said switch 13 I may employ the relay 15 and relay .circuit 16 which-includes one of the electrodes and the solder 17, said 'relay being actuated either from the line circuit or from a supplemental circuit, such as the batteries 18.

In that form of my invention illustrated "in Fig. II, I have shown a slight modification in that in place of employmgtheshunt circuits I have but a single transformer, an armature 19 being controlled by the relay or solenoid 15 to cause the approach of the primary and secondary coils when the relay is energized, the secondary coil being mounted for separation from the primary either by gravity, by the spring 20, or merely by prove desirable, the result being that a relatively low current ordinarily passes through the secondary "circuit, while it is increased upon bringing of the 'two coils into. proximity. y v

In Fig. III, I employ the resistance 21 normally in' the line circuit 1, closingof the switch 13 on encrgization of the relay 15 cutting out this resistance and thus increasing the intensity of the heating circuit In either event, the general operation of my invention is the same, and consists in placing the parts to be united between the electrodes 5 and 6, then closing the switch the intensity of said secondary circuit either by closing the switch 13, by bringing the two coils closer together, or any other suitable manner, thus raising the temperature of the parts to that necessary to performthe op eration. The great advantage of so operatingon the work is that the initial current serves to dry out any oil or other foreign matter on the parts before the temperature is ra1sed to the soldering or welding heat, this drying out insuring making of a better joint than when the temperature of the parts is initially raised to that required.

It is to be noted that I have illustrated my construction as particularly adaptable for use in electric soldering and the drying out of the parts'proves especially desirable:

for soldering. When so used I control the intensity of the heat by-the solder itself in that the solder forms one ofthe terminals of the relay circuit and when touched to the work closes said circuit, while melting of .the solder breaks the circuit and allows the intensity of the heat to be'automatically reduced, as should be readily apparent byreference to the accompanying diagrammatic views.

I claim:

1. An electric soldering apparatus embodying an electrically heated work holder, a body of solder, a-relay in circuit with the holder and solder, and an intensifier controlled by the relay.

2. An electric soldering apparatus embodying aline circuit, a transformer and" -the magnetic repulsion of the parts, as may 7 12, which causes the parts to be heated by. the secondary circuit, and thereafter raising work holding electrodes, a body of solder, a relay circuit including one of the electrodes, and the solder, and an intensifier controlled by the relay.

3. An electric welding apparatus embodying a secondary circuit and an intensifier therefor, and means for cutting out the intensifier upon completion of the welding operation.

4. An electric welding apparatus embody ing a secondary circuit and an intensifier therefor, and means for automatically cutting out the intensifier upon completion of the welding operation.

5. An electric welding apparatus embodying a secondary circuit and an intensifier therefor, and a relay for cutting out the intensifier upon completion of the welding operation. M

6. An electric welding apparatus embodying a secondary circuit, an intensifier there- .for, a relay circuit including .the work,

means for breaking the relay circuit on completion of the work, and means controlled by the relay for regulating the intensifier.

7. An electric soldering or welding apparatus embodyin a work holder, means for electrically heatmg the work when within the holder, means for additionally heating the work in the holder to a temperature which will melt a solder contacting with the work, a solder and means associated with the solder for automatically maintaining the additional heat during the engagement of the solder with the wor 8. In a device of the character described, the combination with a work holder, of electrical means for initially heating the work when within the holder, supplemental means for electrically imparting additional heat to the work when within the holder to melt the solder, a separate and distinct electrical system including the solder and work, and means controlled by said system for automatically rendering the supplemental heating means operative durin the engagement of the solder with the wori.

9. An electro-soldering apparatus embodying a secondary circuit, an intensifier. therefor, a relay and means including the solder for controlling the relay and the intensifier.

In-testimony whereof I aifix my signature in presence of two witnesses.

FREDERICK A. COSTELLO.

Witnesses:

C. FRED HILL, FLORENCE E. CODERRE. 

